Subaru's horizontally-opposed 2.0-liter four cylinder diesel engine is the first of its kind. First revealed in the Outback/Legacy range in Geneva earlier this year, Subaru is now debuting the engine in Paris this October in two of its other models, the Impreza 5-door hatchback and Forester SUV.

Both the Forester and Impreza Boxer Diesels feature new six-speed manual gearboxes while the engine receives a new closed-type diesel particulate filter.

Subaru states the Forester 2.0D boasts class-leading fuel economy and emissions with 44.8 mpg combined and 167 g/km.

The Forester 2.0D produces 147 PS and 258 lb ft torque and the Impreza 150 PS and 258 lb ft – both at 3,600 rpm and 1,800 rpm respectively.

The new Forester Boxer Diesel goes on sale in the UK in late September and the Impreza Boxer Diesel in January 2009.

Subaru Boxer Diesel Engine Paris Debut in Forester and Impreza Models